U.S. patent number 5,105,314 [Application Number 07/395,653] was granted by the patent office on 1992-04-14 for multiple audio signal processing system.
This patent grant is currently assigned to Samsung Electronics Co., Ltd.. Invention is credited to Il-young Ro.
United States Patent |
5,105,314 |
Ro |
April 14, 1992 |
**Please see images for:
( Certificate of Correction ) ** |
Multiple audio signal processing system
Abstract
A multiple audio signal processing system is disclosed which
comprises: a composite system combining a digital audio tape
recorder and a compact disc player; a system controller for
controlling the operation of the composite system in accordance
with the data inputted into a data input of the composite system;
and a signal path control circuit for deciding the signal paths in
accordance with a series of control signals outputted from the
system control circuit. The device of the present invention makes
it possible that the output signals of the compact disc player and
input signals from the external can be selectively recorded on a
tape loaded in the deck of the digital audio tape recorder, and the
output signals of the digital audio tape recorder and the compact
disc player can be outputted to the outside in accordance with the
desire of the user.
Inventors: |
Ro; Il-young (Suwon,
KR) |
Assignee: |
Samsung Electronics Co., Ltd.
(Suwon, KR)
|
Family
ID: |
19277046 |
Appl.
No.: |
07/395,653 |
Filed: |
August 18, 1989 |
Foreign Application Priority Data
|
|
|
|
|
Aug 23, 1988 [KR] |
|
|
88-10716 |
|
Current U.S.
Class: |
360/15; G9B/31;
G9B/27.01; G9B/27.001; G9B/20.009; G9B/19.001; G9B/15; 369/15;
369/85 |
Current CPC
Class: |
G11B
27/031 (20130101); G11B 20/10 (20130101); G11B
15/00 (20130101); G11B 27/002 (20130101); G11B
19/02 (20130101); G11B 31/00 (20130101); G11B
2220/90 (20130101); G11B 2220/913 (20130101); G11B
27/032 (20130101); G11B 2220/2545 (20130101) |
Current International
Class: |
G11B
15/00 (20060101); G11B 27/00 (20060101); G11B
27/031 (20060101); G11B 20/10 (20060101); G11B
19/02 (20060101); G11B 31/00 (20060101); G11B
27/032 (20060101); G11B 005/86 () |
Field of
Search: |
;360/15
;369/84,85,15,14 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Severin; David J.
Attorney, Agent or Firm: Bushnell; Robert E.
Claims
What is claimed is:
1. A multiple audio signal processing system including a digital
audio tape player for recording or reproducing audio signals and a
compact disc player for reproducing audio signals comprising:
system control means for producing first to fourth switch control
signals for controlling said processing system; and
signal path control means having a digital input terminal, a
digital output terminal, a line input terminal and a line output
terminal for connecting said system to an external device;
wherein said signal path control means has a first signal path
responsive to said first switch control signal for selectively
supplying an output of said tape player or an output of said
compact disc player to said line output terminal;
wherein said signal path control means has a second signal path
having one input connected to said line output terminal and a
second input connected to said line input terminal and is
responsive to said second switch control signal for selectively
supplying a signal from said first signal path or a signal at said
line input from an external source to said tape player for
recording;
wherein said signal path control means comprises a third signal
path responsive to said third switch control signal for selectively
supplying an output of said tape player or an output of said
compact disc player to said digital output terminal; and
wherein said signal path control means comprises a fourth signal
path having an input connected to said third signal path and having
another input connected to said digital input terminal and is
responsive to said fourth switch control signal for selectively
supplying a signal in said third signal path or a signal at said
digital input terminal from another external source to said tape
player.
2. A multiple audio signal processing system as set forth in claim
1 wherein said first signal path comprises:
a first switch, responsive to said first switch control signal,
having inputs connected to said tape player output and said compact
disc player output and having an output;
a digital-to-analog converter connected to the output of said first
switch for converting a digital input signal from said tape player
or said compact disc player to an analog signal; and
a low pass filter for filtering said analog signal for output to
said line output terminal.
3. A multiple audio signal processing system as set forth in claim
2, wherein said second signal path comprises:
a second switch, responsive to said second switch control signal,
having inputs connected to said line input terminal and said line
output terminal and having an output;
a low-pass filter connected to said output of said second switch;
and
an analog to digital convertor connected to an output of said
low-pass filter for providing a digital signal to said tape
player.
4. A multiple audio signal processing system as set forth in claim
3, wherein said low-pass filter has a clock frequency equal to a
sampling frequency of said tape player.
5. A multiple audio signal processing system as set forth in claim
3, wherein said third signal path comprises:
a third switch, responsive to said third switch control signal,
having input connected to said tape player output and said compact
disc player output and having an output;
a digital output circuit connected to said output of said third
switch for processing a signal output by said third switch; and
a first buffer for buffering a signal output by said digital output
signal for providing a buffered signal to said digital output
terminal.
6. A multiple audio signal processing system as set forth in claim
5, wherein said fourth signal path comprises:
a fourth switch, responsive to said fourth switch control signal,
having inputs connected to the output of said digital output
circuit in said third signal path and to said digital input
terminal via a second buffer and having an output; and
a digital input circuit connected to said output of said fourth
switch and having an output connected to said tape player.
7. A composite system for multiple audio signal processing, said
composite system comprising:
a digital audio tape recorder and a compact disc player;
data input means for providing input data;
system control means for controlling operation of said composite
system in response to said input data; and
signal path control means for controlling a number of signal paths
in response to a plurality of control signals output by said system
control means;
wherein said signal path control means comprises a first switch in
a first signal path including a digital-to-analog converter and a
first low-pass filter for providing digital output signals from
said compact disc player to said first path, in response to a first
control signal, for recording on a tape in said digital audio tape
recorder, and comprises a second switch in a second path including
a second low-pass filter and an analog-to-digital converter for
enabling said second path to receive said digital signals from said
first path, in response to a second control signal, for input to
said digital audio tape recorder.
8. The composite system as claimed in claim 7, wherein said second
switch has a first input connected to an output of said first
low-pass filter and a second input connected to an input terminal
capable of being connected to an external audio source; and wherein
said second control signal selectively controls said second switch
to select said first input or said second input.
9. The composite system as claimed in claim 7, wherein said
analog-to-digital converter and said digital audio tape recorder
operate at a predetermined sampling rate.
10. The composite system as claimed in claim 7, wherein said signal
path control means further comprises a third switch in a third
signal path including a digital output circuit, a first buffer
means and a digital output terminal capable of being connected to
an external device, said third switch being responsive to a third
control signal; and
wherein said first switch and said third switch each include a
first input connected to an output of said digital audio tape
recorder and a second input connected to an output of said compact
disc recorder.
11. The composite system as claimed in claim 10, wherein said
signal path control means further comprises a fourth switch in a
fourth signal path including a digital input circuit, a second
buffer means and a digital input terminal capable of being
connected to said external device;
wherein said fourth switch includes a first input and a second
input, said first input being connected to an output of said second
buffer, said second buffer having an input connected to said
digital input terminal, and said second input being connected to an
output of said digital output circuit in said third path, said
output of said digital output circuit being further connected to an
input of said first buffer means;
said fourth switch being responsive to a fourth control signal for
selectively providing a digital signal from said second buffer or
said digital output circuit to said digital input circuit, said
digital input circuit being connected to provide a digital signal
to said digital audio tape recorder.
Description
FIELD OF THE INVENTION
The present invention relates to a multiple audio signal processing
system, and particularly to a multiple audio signal processing
system which is used for a composite system constituted by
combining at least two systems such as a digital audio tape
recorder and a compact disc player wherein the output signals of
the compact disc player or the line input signals from the external
source can be selectively recorded on the digital audio tape
recorder, and the output signals from the above-mentioned two
systems can be selected and outputted to the outside.
BACKGROUND OF THE INVENTION
Generally, the storage and transmission of various kinds of
information are being digitalized with the advent of the
information society, and further, in some countries, digital
information eras have been entertained because compact discs and
their PCM broadcastings using satellites have been extensively
supplied.
Digital audio tape recorder is one of the fields which the
digitalization of information is becoming more advanced.
Unlike the compact disc players and the unilaterally transmittable
PCM broadcastings, digital audio tape recorders make it possible to
arbitrarily record and regenerate various kinds of information.
If output signals of the compact disc player are desired to be
recorded onto a tape of the digital audio tape recorder, the input
and output terminals of the two systems should be connected by
means of a line, and the sampling rates of the two systems should
be the same each other.
If the sampling rates of the two systems are different from each
other, no reproduction can be made by the above mentioned method,
and therefore, there is the problem that an expensive digital
analogue converter has to be installed within the digital audio
tape recorder.
SUMMARY OF THE INVENTION
Therefore, it is an object of the present invention to provide a
multiple audio signal processing system of a composite type which
is constituted such that a compact disc player is installed within
a digital audio tape recorder.
It is another object of the present invention to provide a multiple
audio signal processing system of the above-mentioned composite
type which is capable of recording the output signals of the
compact disc player to a tape loaded in the deck of the digital
audio tape recorder.
It is still another object of the present invention to provide a
multiple audio signal processing system of the above-mentioned
composite type, in which the output signals of the compact disc
player or input signals from the external source can be selectively
recorded on a tape loaded in the deck of the digital audio tape
recorder, and the output signals of the digital audio tape recorder
and the compact disc player can be outputted to the outside.
In achieving the above objects, the device of the present invention
comprises: a means for forming a composite system in combining a
digital audio tape recorder and a compact disc player; a system
control means for controlling the operation of the composite system
in accordance with the data inputted into a data input means of the
composite system; and a signal path control means for deciding the
signal paths in accordance with a plurality of control signals
outputted from the system control means.
BRIEF DESCRIPTION OF THE DRAWINGS
The above objects and other advantages of the present invention
will become more apparent by describing the preferred embodiment of
the present invention with reference to the attached drawings in
which.
FIG. 1 is a block diagram of the multiple audio signal processing
system according to the present invention; and
FIG. 2 is circuital illustration of the multiple audio signal
processing system according to the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
As shown in the block diagram of FIG. 1 for the multiple audio
signal processing system according to the present invention, the
composite system constituted by combining a digital audio tape
recorder 100 and a compact disc player 200 includes a system
control means 400, and the system control means 400 is constituted
such that it is capable of controlling the operation of the
composite system in accordance with the data inputted into a data
input means provided within the composite system.
A signal path control means 600 is constituted such that it is
capable of deciding the signal transmission paths in accordance
with a plurality of signals (C.sub.1 -C.sub.4) outputted from the
system control means 400.
A display means 500 is capable of displaying to the external the
data inputted into a data input 300.
FIG. 2 is more detailed circuital illustration of the multiple
audio signal processing system of FIG. 1.
In this drawing, a switch 610 which is provided within the signal
path control means 600 selects the outputs from the signal
processor 150 of the digital audio tape recorder 100 and from the
signal processor 240 of the compact disc player 200 in accordance
with the level of the control signal C1 outputted from the system
control means 400, so that the selected signals should be outputted
by a line through a D/A converter 612 and a low pass filter
614.
Meanwhile, another switch 620 selects the signals outputted from
the signal processors 150, 240 of the digital audio tape recorder
100 and of the compact disc player 200 in accordance with the level
of a control signal C2 outputted from the system control means 400,
so that the selected signals should be outputted through a digital
output circuit 622 and a buffer 624.
Still another switch 630 selects the signal incoming through the
low pass filter 614 and the line-inputted signals in accordance
with the level of a control signal C3 outputted from the system
control means 400, the selection being made in such way that the
clock frequencies of a low pass filter 632 and an A/D converter 634
should be equal to sampling frequency of the digital audio tape
recorder 100.
Still another switch 650 selects the digital input signals and the
signals passing through the digital output circuit 622 in
accordance with the level of a control signal C4 outputted from the
system control means 400, so that the selected signals should be
supplied through a digital input circuit 660 to the signal
processor 150 of the digital audio tape recorder 100.
The digital audio tape recorder 100 is provided with; a servo
section 130 for being controlled by the system control means 400; a
drum 120 for being driven by the servo section 130 and for
recording and regenerating various signals; an amplifier 140 for
recording and regenerating; and a signal processor 150.
The compact disc player 200 is constituted such that a servo
section 210 is controlled by the system control means 400, and the
picked-up compact disc regeneration signals are outputted through
the signal processor 240.
The multiple audio signal processing system according to the
present invention constituted as above will now be described as to
its operations.
First, in order to regenerate the data recorded on a tape of the
digital tape recorder 100, the relevant data is inputted into the
data input means 300 of FIG. 2, and then the servo section 130 will
be activated by the system control means 400 to drive the drum
120.
Accordingly, the data recorded on the tape are picked up, and are
supplied through the regeneration amplifier 140 to the signal
processor 150.
At this time, the system control means 400 will supply the required
control signals to the signal processor 150, and at the same time,
will also supply the control signals C1, C2 to the switches 610,
620.
Thus, the signals processed by the signal processor 150 will be
supplied to each one of the terminals of switches 610, 620, and
therefore, the output signals of the signal processor 150 will be
supplied to both the digital output circuit 622 and the D/A
converter 612. Here, the D/A converter 612 converts the inputted
digital signals to analogue signals, and outputs the analogue
signals through the low pass filter 614, while the digital signals
which have passed through the digital output circuit 622 will be
buffered by the buffer 624, and will be outputted as regeneration
signals.
As described above, when the digital audio tape recorder 100 is
operated under a regeneration mode, the control signals C3, C4
outputted from the system control means 400 will be in a "don't it
care" state, and the compact disc player can be driven, although it
is desirable not to drive it in order to save the power
consumption.
Meanwhile, if the relevant data is inputted into the data input
means 300 in order to regenerate the data recorded on a compact
disc of the compact disc player 200, the servo section 210, after
being activated by the system control means 400, will drive the
pick-up section 220, so that the data recorded on the compact disc
should be picked up, be amplified by the amplifier 230, and be
supplied to the signal processor 240.
At this time, the system control means 400 will supply a proper
signal to the signal processor 240, so that the signals outputted
from the signal processor 240 will be supplied to the other ones of
the terminals of the switches 610, 620.
These signals supplied to the terminals of the switches 610, 620
are selected in accordance with the control signals C1, C2
outputted from the system control means 400.
Therefore, the signals inputted into the switch 610 will be
line-outputted in the form of audio signals through the D/A
converter 612 and the low pass filter 614, while the signals
inputted into the switch 620 will be outputted in the form of
digital signals through the digital output circuit 622 and the
buffer 624.
When the only compact disc player is operated under a regeneration
mode, the control signals C3, C4 outputted from the system control
means 400 may well be in a "don't care" state.
Now the operation of the system according to the present invention
will be described for the case where line-inputted analogue signals
are to be recorded on a tape of the digital audio tape
recorder.
If the relevant data is inputted into the data input means 300 in
order to record the analogue signals inputted into the line input
terminal on a tape of the digital audio tape recorder, then the
system control means 400 will output signals for driving the signal
processor 150, the drum 120, and the servo section 130 of the
digital audio tape recorder 100 in accordance with the inputted
data, and at the same time, will output a control signal C3 to the
switch 630.
Upon supplying of the control signal C3 to the switch 630, the
analogue signals inputted through the line input terminal will be
filtered by the low pass filter 632, and then, will be inputted
into the A/D converter 634.
The signals supplied to the A/D converter 634 will be converted to
digital signals, and then, will be inputted into the signal
processor 150.
Here, the sampling clock rate of the A/D converter 634 is equal to
the sampling rate of the digital audio tape recorder 100.
The signals which are converted to digital signals and are inputted
into the signal processor 150 of the digital audio tape recorder
100 will be amplified by the sound-recording amplifier 140, and
will be recorded on the tape 110 by the drum 120.
In the process of reproducing the line-inputted analogue signals
onto the tape 110, if the control signals C1, C2 outputted from the
system control means 400 are controlled, then the line-inputted
analogue signals, i.e., the signals inputted into the signal
processor 150 will be outputted in the form of line outputs or
digital signals, as described above, owing to the function of the
switches 610, 620.
Meanwhile, the operation of the system of the present invention
will be further described below for the case where the output
signals of the compact disc player 200 are recorded onto the tape
110 of the digital audio tape recorder 100 under the condition that
the sampling rate of the digital tape recorder 100 is different
from the sampling rate of the compact disc player 200.
If the relevant data is inputted into the data input means 300 in
order to record the output signals of the compact disc player 200
onto the tape 110 of the digital audio tape recorder 100, then the
signal processor 240 and the servo section 210 of the compact disc
player 200 will be activated by the system control means 400, and
consequently, the pick-up section 220 will pick up the data
recorded on the compact disc to supply it to the amplifier 230.
The signals supplied to the amplifier 230 will be amplified to a
proper level, and then, will be supplied to the other ones of the
terminals of the switches 610, 620 through the signal processor
240.
Under such a condition, the system control means 400 will supply
the control signal C1 only to the switch 610, so that the signals
picked up from the compact disc will be supplied to the D/A
converter 612.
The digital signals supplied to the D/A converter 612 will be
converted to analogue signals, will be filtered by the low pass
filter 614, and thereafter, will be partly line-outputted, and
partly supplied to the other one of the terminals of the switch
630.
The signals supplied to the terminal of the switch 630 will be
selected by the control signal C3 outputted from the system control
means 400, and will be supplied through the low pass filter 632 and
the A/D converter 634 to the signal processor 150.
Here, the clock sampling rate of the A/D converter 634 will be same
as the sampling rate of the digital audio tape recorder 100.
Upon supplying of the signals through the A/D converter 634 to the
signal processor 150, the signals will be recorded onto the tape
110 through the drum 120 and the sound-recording amplifier 140
controlled by the system control means 400.
In this case, the control signal C2 outputted from the system
control means 400 is supplied to the switch 620 so that the output
signals of the signal processor 150 should be selected, while the
control signal C4 supplied to the switch 650 is placed on a "don't
it care" state.
Now the process of recording the output signals of the compact disc
player 200 onto the tape 110 of the digital audio tape recorder 100
will be described under the condition that the sampling rate of the
digital audio recorder 100 is the same as the sampling rate of the
compact disc player 200.
Referring to FIG. 2, in order to record the output signals of the
compact disc player 100 onto the tape 110 of the digital audio tape
recorder 100, if the relevant data is inputted into the data input
means 300, then the signal processor 240 and the servo section 210
of the compact disc player 200 will be activated by the system
control means 400, so that the signals picked up from the compact
disc will be supplied to the amplifier 230.
The signals after being amplified by the amplifier 230 will be
supplied through the signal processor 240 to the other ones of the
terminals of the switches 610, 620.
Under this condition, the control signals C1, C2 outputted from the
system control means 400 will be supplied to the control terminals
of the switches 610, 620, so that the signals should be selected
from the above mentioned terminals.
Meanwhile, the control signal C4 outputted from the system control
means 400 will be supplied to the control terminal of the switch
650, while the control signal C3 supplied to the control terminal
of the switch 630 is put to a "don't it care" state.
Accordingly, the signals picked up from the compact disc and
selected by the switch 620 will be supplied through the digital
output circuit 622, the switch 650 and the digital input circuit
660 to the signal processor 150 of the digital audio tape recorder
100, and then, the signals will be ultimately recorded onto the
tape 110.
Finally the operating process for recording external digital
signals onto the tape 110 of the digital tape recorder 100 will be
described.
If the relevant data is inputted into the data input means 300 in
order to record external digital signals onto the digital audio
tape 100, then the system control means 400 will output the control
signal C4, so that the switch 650 should select the signals passed
through the buffer 640.
The external signals selected by the switch 650 will be supplied
through the digital input circuit 660 to the signal processor 150
of the digital audio tape recorder 100, and then, will be recorded
on the tape 110 as described above.
The present invention was described in the above based on the
embodiment of FIG. 2.
But it should be understood that the function of the digital input
circuit 660 of FIG. 2 can be merged with the signal processor 150,
and in the case of a stereo system each one of an A/D converter
634, a D/A converter 612, and low pass filters 614, 632 should be
added.
Further, the levels of the plural control signals C1, C2 outputted
from the system control means 400 are determined in order that only
one group from among the signals supplied to both of the input
terminals should be selected, while the switches 610, 620, 630, 650
are analogue switches for selecting the signals supplied to both of
the input terminals in accordance with the levels of the control
signals C1-C4.
As described above, the present invention combines a digital audio
tape recorder and a compact disc player in such a manner that
pick-signals of a compact disc or signals inputted from the
external source can be conveniently reproduced onto a digital audio
tape depending on the desire of the user.
* * * * *